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94 6.5 diesel K3500 died going down the road. Will not restart. It died like it was

J

jrsavoie

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94 6.5 diesel K3500 died going down the road. Will not restart.

It died like it was a PMD issue. But never restarted like a PMD normally would.

Lift pump is working good.

The fuel shut off solenoid is working

Fuel filter is changed. Looked dirty but it still had good flow from the T/drain valve and the filter bleeder.

The injector pump return line did not seem like it had as much flow as it should,
Is it possible to back flow into the IP?

The PMD's are good. I tried different "known to be good PMD's and extension harnesses. No change = no start.

It is obviously NOT getting fuel. No smoke, no nothing.

The glow plugs are cycling normally.

I used to have a sheet on how to test the PMD. I seem to have lost it. Does anybody have a good checklist for the PMD?

I am going to double check the Injection Pump return line tomorrow.

Any other thoughts would be enormously appreciated.

Checked grounds and fuses - all good

If anybody is interested, I would pay for a house call. Near L'Erable, Illinois

I'm stumped
 
Easy as 1,2,3.
1.Carefully check all the pins in cable and pmd, easy to bend when changing out bad one for known good.

2.Bypass fuel shut off solenoid to rule it out.

3.Get mad and convert to db2. Ok just trying to cheer you up some. There is something else i missed here, to long of shift at work today to think good, sorry.
 
You check the ground by trans dip stick? (we really need a name for that thing, its such a common problem).
Could be ECM fuse or possibly Ing switch. 94's are easy to change.
 
Optic sensor? Crank position sensor? A failed timing chain? Valve train moving? A shot from the hip on my part..
 
3500GMC said:
Optic sensor? Crank position sensor? A failed timing chain? Valve train moving? A shot from the hip on my part..
Click to expand...

Any suggested diagnostics to check for this stuff?

Have plenty of fuel. I ran 3/4 gallon out the T drain with the lift pump jumpered. Ran another quart out the fuel filter bleeder. Had fuel out the fuel shut off solenoid when I took it out to check it.

Where is the ECM fuse. The grounds are good. I did not add a ground to that stud from the battery, yet. I usually run a ground directly from the battery to that stud. I've seen that stud lose ground, when you run a ground directly to the stud and cover everything with copper coat you rarely lose connection
 
5 speed crew cab 4x4? Dont tempt me! lol

Does it sound normal cranking? Smoke out the tail pipe?

How old is the IP? I wonder if the pump locked up and sheared the IP shaft?

I'm just throwing out ideas.
 
DOUBLE CHECKED the IP return line. Getting good flow out og the IP. But no start.

Redoing grounds again now and adding the extra ground wires that I always add. I add grounds from the battery to the battery box to compensate for the cheesy ground that attaches to the passenger fender.
I also add a ground to the frame at the spot by the starter and a ground directly to the stud by the firewall. I've seen that stud lose ground before - several times. Having a ground to that stud directly from the battery eliminates that possibility.
Can't believe I never added the grounds to this vehicle yet.
I also add a ground from the heater blower to the dash bolt inches away. I did that one when I changed the blower
 
great white said:
Fault codes?
Click to expand...

I haven't checked codes. It's been so long, I do not remember how. Does anybody have a link to the thread on checking codes on a 1994? I'm sure it's in the stickies. That will probably be my next stop when I come back in.

5 speed crew cab 4x4? Dont tempt me! lol

Does it sound normal cranking? Smoke out the tail pipe? Normal Cranking - absolutely NO Smoke

How old is the IP? I wonder if the pump locked up and sheared the IP shaft? The pump was replaced sometime in the last 8 years/50,000 miles or so by the previous owner. How do I test for this.

I'm just throwing out ideas.

Keep throwing
 
Have you cracked one of the lines to an injector (#1 and #3 are probably the easiest to get to) to see if fuel is getting to the injectors during cranking? No smoke and no start with good fuel pressure to the IP and having confirmed the Fuel Solenoid harness is good as well as the Shut Off, and that many PMD's...you're quickly running out of options.

OBD I DTCs and how to check with a paper clip link http://www.thetruckstop.us/forum/showthread.php?2657-A-little-help-here&p=50700#post50700
 
If the grounds are good, ecm is ok (If you need a test ECM I know where one is for a 94 K3500 5speed 5068ip), and fuel shut off checks out. Then my last idea is the IP seized (never personally had it happen). I would guess the only way check is try to spin the pump by hand.

Of course I would exhaust all other options before pulling the pump.
 
Does anybody know where the little tiny ground on the 2nd stud in from the back of the engine on a 94 terminates? It looks like it could be a little sketchy.
I would route to the termination point, if I knew where that was. It heads into the large loom that runs across the firewall and heads towards the drivers side.

Are there any fuses on a 1994 that are not in the fuse box under the dash other than the lift pump fuse on the firewall?
Does the lift pump fuse run anything other than the lift pump? I have the side of that fuse that goes to the lift pump jumpered to run the lift pump fulol time while I'm messing around

Haven't got to cracking the injectors. That was down on my list til I get done with the basics. Even though that is kind of a basic in itself. I am relatively positive there is no fuel there.
If it was the timing chain, would I hear some obnoxious noise when cranking?
What is the easiest way to check for a timing chain issue? That has actually been on my to do list for a year. Have the timing set here.
Worst is, this is our last vehicle. I haven't been able to get much done. The 96 needs ball joints and fuel lines I hope. It's leaking a lot of fuel in the valley. Hoping for fuel lines or FFM and not IP.
The 98 needs a transmission at the least. Not sure how it's going to run. It's been sitting a while. I start it every other day or so. It was running funny when the transmission went out. Don't know if that could be transmission related or not.
The 95 also has a fuel leak. Hoping the same for it as the 96 Suburban.
The Jeep is still in Wisconsin getting the engine installed. Won't have it back til after Christmas.
If anybody fairly close knows a good cheap vehicle that we could run til we get something back together, we sure would appreciate a HEADS UP. Something we could run and sell or even keep.
 
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